CAJ | 학술논문

为了改善在非视距传播条件下的定位精度，研究和提出了一种测距信息融合定位方法。在NLOS指数分布模型下，利用锚节点传感器测量来自未知节点的接收信号强度、电波到达时间和电波达到角信息，首先将3种测距信息测量值构成一个测距信息集数据库，建立有效的多级联合判决机制，然后利用各自测量量获得相关的距离信息，并进一步利用获得的测距信息进行两两联合求解，剔除异常信息，最后进行加权融合处理得到未知节点坐标。计算机仿真结果表明，本文所提定位方法能有效地抑制NLOS误差，较传统定位方法提高了定位精度。
위료개선재비시거전파조건하적정위정도，연구화제출료일충측거신식융합정위방법。재NLOS지수분포모형하，이용묘절점전감기측량래자미지절점적접수신호강도、전파도체시간화전파체도각신식，수선장3충측거신식측량치구성일개측거신식집수거고，건립유효적다급연합판결궤제，연후이용각자측량량획득상관적거리신식，병진일보이용획득적측거신식진행량량연합구해，척제이상신식，최후진행가권융합처리득도미지절점좌표。계산궤방진결과표명，본문소제정위방법능유효지억제NLOS오차，교전통정위방법제고료정위정도。
In order to improve the positioning accuracy under the NLOS ( Non-Line-Of-Sight propagation ) , a joint range-based positioning method is proposed.The method uses RSSI (Received Signal Strength Indication), TOA ( Time Of Arrival) and AOA ( Angle Of Arrival) information measured by the anchor node to construct a ranging information data base firstly.Then an effective multi-level decision mechanism is built, and its measurement infor-mation is used to obtain the relevant distances.After joint problem is solved by the ranging information, the abnor-mal information is eliminated.Finally the position of the unknown node is gotten by weighted fusion.The simula-tion results show that the proposed positioning method can restrain NLOS error effectively, and has better positio-ning accuracy than that of the traditional methods.